Add dependency to glm due to upstream commit: https://github.com/xbmc/visualization.waveform/commit/18e32dd2416fc58e91c977d3c3a4c27b6ca59c3b Switch license file to LICENSE.md. Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>